Grinding-mill.



E. R. DRAVER.

` GRINDING MILL.

APPLICATION FILED AUG.11, 1913. 1,097,010, Patented May 19, 1914.

COLUMBIA PLANOURAPH C0..w^sHl|NGToN. D.

UNIE@ TATS? PATENT OFFICE.

EMIL: R. DRAVER, 0F RICI-IMGND, INDIANA, ASSIGNOR TO THE WOLF CO., OF CHAMBERSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GRINDING-MILL.

Specification of Letters Patent.

Application led August 11, 1913. Serial No. 784,103.

To all wlw-m, it may concern Be it known that I, EMIL It. BEAVER, a citizen of the United States, residing in Richmond, in the county of lVayne and State of Indiana, have invented certain new and useful Improvements in Grinding- Mills, of which the following is a full, clear, and comprehensive specification, being such as will enable others to make and use the same with exactitude.

This invention pertains to certain specic improvements in cereal grinding mills, in which a compound scroll operates in conjunction with a fixed resistance-plate, to provide the desired attrition upon the material acted upon.

The predominant and particular object of my present invention is to provide a series of auxiliary blades to be employed in connection with the usual scroll heretofore employed, and to provide other minor improvements, all of which will be pointed out in the following specification.

The preferred means which I employ to carry out my invention in a practical manner is shown in the accompanying drawings, in which- Figure 1 is a side elevation of my mill, certain of the parts being shown in vertical central section in order to exhibit interior mechanism. In said figure the normal position of the scroll or grinding blades is shown. Fig. 2 is similar to Fig. 1 in all particulars, except that it is taken from the opposite direction and also showing another position of the scroll or blades. Fig. 3 is a cross section of the scroll hub, as taken on line 3 3 of Figs. 1 and 2, showing the relative positions of the auxiliary blades. And Fig. 4c is a perspective view of one of the auxiliary blades alone.

Similar indices denote like parts throughout the several views.

In order that the construction, the operation, and the advantages of my invention may be fully understood and appreciated I will now take up a detailed description thereof, in which I will set forth the invention as comprehensively as I may.

Referring now to the drawings in detail, numeral 1 denotes the pedestal or supporting frame, carrying on its upper end the relatively long horizontal bearing 2. Also carried by the pedestal 1 is the main casing 3, which is round in cross section, lthat is at right angles to the aperture in the bearing 2, and it is concentric therewith. Formed integral with the upper portion of the casing 3 is the inlet spout at, by which inlet is obtained to the interior of the casing 3. One end of the casing 3 is closed by the end 3', and the other end is partly closed by the 'tapering' resistance plate 5, which latter projects outward convergently. Formed centrally through the outer end of the plate 5 is a round discharge aperture or mouth, as indicated at a, the same being concentric with the casing 3 and the bearing 2. Attached around the discharge mouth a, and carried by the plate 5, is the chamber 6, into which the mouth a opens. Covering the top of chamber 6 is the sliding lid 7, and in the lower portion of chamber 6 is the exit Revolubly mounted in thebea'ring 2 and projecting at each end beyond said parts is the hollow shaft 8. Rigidly mounted on shaft 8, near the bearing 2, is the drivepulley 9.

Numeral 10 denotes a bearing secured to the outer face of the chamber 6 and in which the shaft 8 is revolubly mounted. Numeral 11 denotes a stem which extends through the shaft 8. Secured on the end of stem 11, near the pulley 9, is the ball-bearing collar or head 12, the same being adapted to contact with that end of shaft 8. Threaded on plate 5, is the hub 17. Extending out atV an angle, divergently, from the outer end of the hub 17, is the flange 18,-the periphery of the outer end of which is adapted to almost close the mouth a, as in Fig. 1. Radiating out from the hub 17, from the end thereof opposite to the fiange 18, is a plurality of blades 19 which collectively extend across the entire interior of the casing 3, as shown.

Extending inward from the inner face of Patented May 19, 1914.

the plate 5 is a plurality of triangular lugs e, e, e and e, preferably four in number, which are adapted to prevent the material from slipping.

The operation of 'said parts 1s subst-antially as follows: The pulley 9 is to be revolved in any well known manner, and in the direction indicated by the arrows thereon, and this of course will revolve the shaft 8, the cone composed of the parts 17 and 18, and the blades 19. The spring 15 will normally retain the scroll in the position shown in Fig. 1, at which. time the hub of pulley 9 will engage the outer end of the bearing 2 as shown. The material to be treated will enter the interior of the casing 3, through the inlet et, from which it will be forced forward by the blades 19, and by which it is also disintegrated, the body of material being prevented from packing and slidingV around within the interior of plate 5 by reason of the lugs e, e, e, e", the finished product being finally allowed to escape through the mouth a and around the periphery of the flange 18. From the chamber 6 the finished product may be conveyed through the exit Z; to the point desired. The condition of the product may be examined by opening the lid 7.

The most prominent feature of my present invention resides in the provision of a plurality of auxiliary trapeZium-shaped blades 20, 21 and 22, each having a pair of ears: f f', gf-g, and L-L, respectively, each ear having an aperture therethrough whereby the blades may be secured in position by means of screws, rivets, or the like. The positions of said blades 20, 21 and 22 are at an angle with relation to the flange 18 and the hub 17, across which they are disposed diagonally, substantially as shown, same being located edgewise with relation to the surfaces of t-he hub 17 and the flange 18, and with the larger end of each of the auxiliary blades located near to and parallel with the inner face of the resistance plate 5. By means of the auxiliary blades 20, 21 and 22 I have found that the capacity of the mill is materially increased and also the resultant product is improved, as greater attrition is attained.

Vith my construction l nd that it is practically impossible to choke or stall the mill by a plethora of material being delivered to the blades, for the reason that the scroll, or revolving cone and blades, is automatically adjustable to the proper compression with the resistance plate 5 and the discharge mouth a, the spring 15 at all time compensating the load.

ln practice I find it desirable to employ a less number of auxiliary blades than the numberof relatively fixed blades and also, as shown, the auxiliary blades are shorter than .are the fixed blades, they are also disposed at a greater angle with relation thereto; also the auxiliary blades are spaced some distance from vthe fixed blades, being adapted to operate on the material after it leaves the fixed blades. vThe material referred to relates to cereals, particularly to wheat or its derivations in the course of manufacture into flour 0r the like.

,l desire that it be understood that various changes may be made in the several details of construction herein shown and described wit-hout departing from the spirit of my invention or sacrificing any of the advantages thereof. y V

Having new fully shown and described my invention, what l claim and desire to secure Vby Letters Patent of the United States, is-- 1. A grain grinding mill having a grinding-chamber, a conical resistance plate carried by the discharge end of the said chamber, there being a comparatively large central aperture through the resistance plate, a shaft extending centrally through said cha-mber and said aperture, a hub secured on said shaft and located in said chamber, a flange extending out divergently from the outer end of said hub with its periphery fitting said opening in the resistance plate, a plurality of angularly disposed blades arranged in a single row radiating from and formed integral with said hub and extending across said chamber, a plurality of trapeziumshaped blades disposed diagonally across the periphery of said flange and a portion of the hub, a plurality of triangular lugs eX- tending from the inner face of the resistance-plate into the interior of said resistance plate, and means for laterally adjusting the hub and the parts thereto attached, all substantially as set forth.

2. In combination with a grain grindingmill having a grinding chamber, a resistance plate of conical form closing one end of said chamber except for a central aperture therethrough, a shaft extending through said chamber horizontally, a hub secured on said shaft, a plurality of blades located in a single row around and formed integral with said hub, the fiange 18 flaring out from the discharge end of said hub with its periphery fitting the aperture in the resistance plate, the trapezium-shaped blades 20, 21 and 22 removably secured diagonally across the inner face of said flange, and the triangular lugs e, e', e and 6 projecting inward from the inner face of the resistance plate, all substantially as shown and described.

3. ln combination with a grinding mill having a revolving scroll including a plurality of relatively fixed blades, a plurality of auxiliary blades carried by the scroll and being less in number than the number of fixed blades and also placed at angles different from `that of the fixed blades and adapted to operate upon the material after it has passed the fixed blades, all substantially as shown and described.

4. In a grinding mill having a grindingchamber, a resistance plate extending out convergently with a central aperture therethrough, a shaft extending through said chamber and aperture, a hub mounted on the shaft, a flange carried by the hub and adapted to lit in said aperture, a plurality of lixed blades carried by the hub, and a plurality of auxiliary blades carried by the fiange and adapted to operate upon the material after it leaves the fixed blades.

5. In a grinding mill having a grindingchamber, a resistance-plate extending out convergently from said chamber and with a central aperture therethrough, a shaft extending through said chamber and aperture, a hub mounted on the shaft, a flange extending out diver-gently from said hub and adapted to fit in said aperture, lugs extending inward from the resistance plate, a yielding tension normally retaining the ange in said aperture, a plurality of auxiliary blades carried by said fiange and disture formed through the resistance plate, a Y

shaft extending through said chamber and aperture in the resistance plate, a hub carried by the shaft and located in said chamber, fixed blades radiating from the hub, a`

flange carried by the hub and adapted to operate in said opening in the resistance plate, and a plurality of auxiliary blades secured diagonally across said flange With their outer ends adjoining the outer edge of said flange and corresponding With the angle of the resistance plate, all substantially as shown and described.

In testimony whereof I have hereunto subscribed my name to this specification in the presence of tivo subscribing Witnesses.

EMIL n. DRAVER.

l/Vitnesses R. W. HANDLE, It. E. RANDLE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

